4 years ago

Help me with this question

Mathematics

1 answer:

Savatey [412]4 years ago

4 0

Answer:

1/8

Step-by-step explanation:

to find your answer just divide the numerator by the denominator

1 divided by 8= 0.125

5 divided by 6= 00.833333333

2 divided by 3= 0.66666666667

2 divided by 5= 0.4

do these equations on a calculator (if allowed) or by hand or you can memorize it

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How to find r in this equation using combination formula C(8,r)=28<br>

slavikrds [6]

Answer:

r = 2

Step-by-step explanation:

We have the formula of $^nC_r = \frac{n!}{r! (n-r)!}$

Now, it is given that $^8C_r = \frac{8!}{r! (8-r)!} = 28$ ........ (1)

And we have to find the value of r which satisfy the above equation.

So, $r! (8-r)! = \frac{8!}{28} = \frac{40320}{28} = 1440$

Now, we have to use the trial method to find the value of r.

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Hence, r can not be 1.

Now, put r = 2, $2! (8-2)! = 2 \times 6! = 1440$

Therefore, r = 2 (Answer)

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3 years ago

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Answer:

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Step-by-step explanation:

7 divided by 16

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Step-by-step explanation:

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{Hope that helps}

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